/* ===================================
   公文排版助手 - 官网样式表 (清新靓丽的全新设计)
   Design Principles: 清新、活力、紧凑、时尚
   =================================== */

/* CSS 变量定义 - 清新配色方案 */
:root {
    /* 主色调 - 清新紫罗兰 */
    --primary-color: #8B5CF6;
    --primary-dark: #7C3AED;
    --primary-light: #EDE9FE;

    /* 辅助色 - 活力珊瑚橙 */
    --accent-color: #F97316;
    --accent-hover: #EA580C;

    /* 渐变配色 */
    --gradient-primary: linear-gradient(135deg, #8B5CF6 0%, #6366F1 100%);
    --gradient-hero: linear-gradient(135deg, #FDF4FF 0%, #EDE9FE 50%, #DBEAFE 100%);
    --gradient-card: linear-gradient(180deg, #FFFFFF 0%, #FAFAFA 100%);

    /* 中性色 - 柔和 */
    --text-primary: #1E1B4B;
    --text-secondary: #4C1D95;
    --text-muted: #7C3AED;
    --border-color: #E9D5FF;
    --bg-white: #FFFFFF;
    --bg-light: #FAF5FF;
    --bg-soft: #F3E8FF;

    /* 阴影 - 柔和梦幻 */
    --shadow-sm: 0 1px 3px rgba(139, 92, 246, 0.08);
    --shadow-md: 0 4px 12px rgba(139, 92, 246, 0.12);
    --shadow-lg: 0 8px 24px rgba(139, 92, 246, 0.16);
    --shadow-xl: 0 16px 48px rgba(139, 92, 246, 0.2);

    /* 过渡 */
    --transition-fast: 200ms ease;
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* 圆角 - 更圆润 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
}

/* 重置样式 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===================================
   导航栏 - 清新简约
   =================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-icon {
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    padding: 10px 18px;
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: var(--primary-color);
    background-color: var(--primary-light);
}

/* 移动端菜单按钮 */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2.5px;
    background-color: var(--primary-color);
    border-radius: 2px;
    transition: var(--transition-fast);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ===================================
   Hero 区域 - 清新渐变
   =================================== */
.hero {
    min-height: 500px;
    display: flex;
    align-items: center;
    padding: 40px 0 40px;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 60%;
    height: 100%;
    background: radial-gradient(circle, rgba(249, 115, 22, 0.06) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text {
    max-width: 500px;
}

.hero h1 {
    font-size: 2.75rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 12px;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.35rem;
    font-weight: 600;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}

.hero-description {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* 按钮样式 - 清新活泼 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: var(--transition-normal);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 14px rgba(139, 92, 246, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.45);
}

.btn-secondary {
    background-color: white;
    color: var(--primary-color);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    background-color: var(--primary-light);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-block {
    width: 100%;
}

.btn-icon {
    font-size: 1rem;
}

/* Hero 区域 - 软件演示图 */
.hero-mockup {
    background-color: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transform: perspective(1000px) rotateY(-2deg) rotateX(1deg);
    transition: var(--transition-bounce);
}

.hero-mockup:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.mockup-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background-color: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
}

.dot {
    width: 11px;
    height: 11px;
    border-radius: 50%;
}

.dot.red { background: linear-gradient(135deg, #FCA5A5, #EF4444); }
.dot.yellow { background: linear-gradient(135deg, #FDE047, #EAB308); }
.dot.green { background: linear-gradient(135deg, #86EFAC, #22C55E); }

.window-title {
    flex: 1;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.mockup-body {
    display: grid;
    grid-template-columns: 160px 1fr;
    min-height: 280px;
}

.mockup-sidebar {
    background-color: #4C1D95;
    padding: 12px;
}

.menu-item {
    padding: 10px 14px;
    color: #C4B5FD;
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
}

.menu-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
}

.menu-item.active {
    background-color: var(--primary-color);
    color: white;
}

.mockup-main {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background-color: var(--bg-light);
}

.upload-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 240px;
    padding: 32px 16px;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    background-color: white;
    margin-bottom: 16px;
}

.upload-icon {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.upload-area p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.upload-tip {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.mockup-btn {
    padding: 10px 28px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.mockup-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 16px rgba(139, 92, 246, 0.4);
}

/* Hero 区域 - 真实截图 */
.hero-screenshot {
    display: block;
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    transition: var(--transition-bounce);
}

.hero-screenshot:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(139, 92, 246, 0.2);
}

/* ===================================
   通用区块样式 - 紧凑设计
   =================================== */
.section-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.section-subtitle {
    text-align: center;
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 40px;
}

/* 功能特性 */
.features {
    padding: 70px 0;
    background-color: var(--bg-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.feature-card {
    padding: 28px;
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    font-size: 1.75rem;
    background: var(--primary-light);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    transition: var(--transition-normal);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 软件界面截图 */
.screenshot {
    padding: 70px 0;
    background: var(--gradient-hero);
}

.screenshot-container {
    max-width: 850px;
    margin: 0 auto;
}

.screenshot-frame {
    background-color: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.screenshot-img {
    display: block;
    width: 100%;
    height: auto;
}

.screenshot-caption {
    text-align: center;
    padding: 12px;
    font-size: 0.85rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-light);
}

/* 下载区域 */
.download {
    padding: 70px 0;
    background-color: var(--bg-white);
}

.download-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 36px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.download-card {
    position: relative;
    padding: 32px;
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: var(--transition-normal);
}

.download-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.download-card.featured {
    border-color: var(--primary-color);
    background: linear-gradient(180deg, #F5F3FF 0%, #FFFFFF 100%);
    box-shadow: 0 0 0 1px var(--primary-color);
}

.featured-badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 16px;
    background: var(--gradient-primary);
    color: white;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: var(--radius-full);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.download-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.card-version {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.card-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

.card-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.install-commands {
    margin-top: 10px;
    padding: 14px;
    background-color: var(--bg-soft);
    border-radius: var(--radius-md);
    text-align: left;
    border: 1px solid var(--border-color);
}

.install-commands code {
    display: block;
    font-family: "SF Mono", "Consolas", "Monaco", monospace;
    font-size: 0.8rem;
    color: var(--text-primary);
    padding: 3px 0;
}

/* 提示框 */
.notice-box {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 20px;
    background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
    border: 1px solid #FCD34D;
    border-radius: var(--radius-lg);
    max-width: 700px;
    margin: 0 auto;
}

.notice-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.notice-content h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: #92400E;
    margin-bottom: 8px;
}

.notice-content ul {
    list-style: none;
    padding: 0;
}

.notice-content li {
    position: relative;
    padding-left: 16px;
    font-size: 0.9rem;
    color: #78350F;
    margin-bottom: 6px;
    line-height: 1.5;
}

.notice-content li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #D97706;
}

.notice-content strong {
    font-weight: 600;
}

/* FAQ 区域 */
.faq {
    padding: 70px 0;
    background: var(--gradient-hero);
}

.faq-list {
    max-width: 750px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 12px;
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-normal);
}

.faq-item:hover {
    border-color: var(--primary-color);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 16px 20px;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: var(--transition-fast);
}

.faq-question:hover {
    background-color: var(--bg-light);
}

.question-text {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.5;
    padding-right: 12px;
}

.faq-icon {
    font-size: 1.25rem;
    font-weight: 300;
    color: var(--primary-color);
    transition: var(--transition-normal);
    flex-shrink: 0;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.faq-item.active .faq-answer {
    max-height: 400px;
}

.faq-answer p {
    padding: 0 20px 16px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===================================
   页脚 - 简约设计
   =================================== */
.footer {
    padding: 48px 0 20px;
    background: var(--gradient-primary);
    color: white;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 32px;
}

.footer-logo {
    display: inline-block;
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: white;
}

.footer-desc {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

.footer-links {
    display: flex;
    gap: 48px;
}

.footer-column h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: white;
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: 8px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.75);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ===================================
   响应式设计
   =================================== */

/* 平板设备 */
@media screen and (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 36px;
    }

    .hero-text {
        max-width: 100%;
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1.15rem;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-mockup {
        max-width: 420px;
        margin: 0 auto;
        transform: none;
    }

    .hero-mockup:hover {
        transform: none;
    }

    .hero-screenshot {
        max-width: 480px;
        margin: 0 auto;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .download-cards {
        grid-template-columns: repeat(2, 1fr);
        max-width: 650px;
        margin-left: auto;
        margin-right: auto;
    }
}

/* 手机设备 */
@media screen and (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background-color: white;
        flex-direction: column;
        padding: 16px;
        gap: 0;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-normal);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-menu li {
        width: 100%;
    }

    .nav-link {
        display: block;
        padding: 14px 0;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding: 32px 0 32px;
        min-height: 400px;
    }

    .hero h1 {
        font-size: 1.85rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-description {
        font-size: 0.95rem;
    }

    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }

    .mockup-body {
        grid-template-columns: 1fr;
    }

    .mockup-sidebar {
        display: none;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .section-subtitle {
        font-size: 0.9rem;
        margin-bottom: 28px;
    }

    .features {
        padding: 48px 0;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .feature-card {
        padding: 20px;
    }

    .screenshot,
    .download,
    .faq {
        padding: 48px 0;
    }

    .download-card {
        padding: 24px;
    }

    .download-card h3 {
        font-size: 1.15rem;
    }

    .download-cards {
        grid-template-columns: 1fr;
        max-width: 450px;
    }

    .notice-box {
        flex-direction: column;
        padding: 16px;
    }

    .footer {
        padding: 36px 0 16px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

/* 小屏手机 */
@media screen and (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero h1 {
        font-size: 1.6rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 10px;
    }

    .btn {
        width: 100%;
    }

    .faq-question {
        padding: 14px 16px;
    }

    .question-text {
        font-size: 0.85rem;
    }

    .faq-answer p {
        padding: 0 16px 14px;
        font-size: 0.85rem;
    }
}

/* ===================================
   动画效果
   =================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse-soft {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
}

.hero-text {
    animation: fadeInUp 0.6s ease forwards;
}

.hero-image {
    animation: fadeInUp 0.6s ease 0.15s forwards;
    opacity: 0;
}

.feature-card {
    opacity: 0;
    animation: fadeInUp 0.5s ease forwards;
}

.feature-card:nth-child(1) { animation-delay: 0.05s; }
.feature-card:nth-child(2) { animation-delay: 0.1s; }
.feature-card:nth-child(3) { animation-delay: 0.15s; }
.feature-card:nth-child(4) { animation-delay: 0.2s; }
.feature-card:nth-child(5) { animation-delay: 0.25s; }
.feature-card:nth-child(6) { animation-delay: 0.3s; }

/* 悬停效果增强 */
.feature-card:hover .feature-icon {
    transform: scale(1.15) rotate(8deg);
}

.btn-primary {
    animation: pulse-soft 3s ease-in-out infinite;
}

.btn-primary:hover {
    animation: none;
}

/* 选中状态颜色 */
::selection {
    background-color: var(--primary-light);
    color: var(--primary-dark);
}

/* 滚动条样式 - 紫色系 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-soft);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #C4B5FD, #8B5CF6);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, #A78BFA, #7C3AED);
}